248 MOSQUITOES OF NORTH AMERICA 



rings at insertions of hair whorls ; hairs long, brown. Coloration similar to the 

 female. Wings narrower, the stems of the fork-cells longer, vestiture sparse. 

 Abdomen moderately hairy on the sides, the hairs long ; lateral segmental spots 

 larger than in the female, tending to form basal bands. Claw formula, 

 1.1-1.1-0.0. 



Length : Body about 3 mm. ; wing 3 mm. 



Genitalia (plate 14, fig, 101) : Side-pieces about three times as long as wide, 

 somewhat attenuated towards the base, a low, rounded outer lobe bears three rods 

 with hooked tips, a leaf -like appendage, and a seta ; clasp-filament moderate, 

 uniform, with a small terminal claw. Harpes divided, the inner lobe stout, 

 rounded, with a crown of spines, outer lobe blade-like, curved. Harpagones 

 divided into numerous lamellae, their inner angles forming a group of denticles. 



The larvae live in the water in hollow trees and similar locations. Mr. Jen- 

 nings found them in a hole in the center of a large " cedar " stump near the 

 banks of a river. The stump was newly cut, the water foul and highly colored. 

 Unfortunately no specimens were preserved. The larvae were associated with 

 those of Lutzia bigotii. 



Panama. 



Cascajal River, 2.5 miles from its mouth, in Porto Bello Bay, Panama, bred 

 from larvae, May 30, 1908 (A. H. Jennings). 



CULEX T^NIOPUS Dyar & Knab. 



Culex twniopus Dyar & Knab, Journ. N. Y. Ent. Soc, xv, 100, 1907. 

 Culex tarniopus Busck, Smiths. Misc. Colls., quart, iss., lii, 69, 1908. 

 Culex twniopus Theobald, Mon. Culic, v, 614, 1910. 



Original Description of Cuuex twniopus: 



Proboscis and palpi black; thorax dark brown with black and ochraceous scales, 

 not forming a defined pattern; abdomen with dark scales bluish luster and brown 

 hairs, unhanded above; legs black, with broad white rings on the tarsi, involving 

 both ends of the joints, the last tarsal joint wholly white. Wings with brownish 

 scales on the veins, not very dense. 



One $, Bluefields, Nicaragua (W. F. Thornton). 



Type Cat. No. 10260, U. S. Nat. Mus. 



Description of Female of Culex t.eniopus (Male and Larva Unknown) : 



Female. Proboscis moderate, subcylindrical, slightly expanded at tip, labellae 

 conically tapered : vestiture blackish ; setae minute, curved, black, those on 

 labellae more prominently outstanding. Palpi short, one-fifth as long as pro- 

 boscis, black, with a few outstanding setae. Antennae with the basal joints some- 

 what shorter, rugose, densely pilose, dark brown ; tori subspherical, with a cup- 

 shaped apical excavation, blackish brown ; hairs of whorls sparse, moderate, 

 black. Clypeus roundedly triangular, doubly excavated at base, blackish, nude. 

 Eyes black. Occiput brown, with narrow, curved bronzy-brown scales on vertex, 

 broad, flat ones on lower part of sides, black, the margin of eyes broadly white- 

 scaled laterally, narrowly above; many erect, forked black scales on the nape; a 

 row of black bristles along margins of eyes. 



Prothoracic lobes elliptical, remote dorsally, bro^vn, clothed with dark bristles. 

 Mesonotum dark brown anteriorly, with two dorsal impressed bare concolorous 

 lines ; vestiture of narrow, curved, lustrous dark-brown scales and rows of black 

 bristles. Scutellum trilobate, dark brown, clothed with narrow, curved bronzy- 

 brown scales, each lobe with a tuft of brown bristles. Postnotum elliptical, 

 prominent, brown, nude. Pleurae and coxae brown, with rows of dark bristles 

 and patches of white scales. 



Abdomen subcylindrical, truncated at tip ; dorsal vestiture dark brown, with 

 a bronzy or blue-black reflection ; a row of pale bristles at tip of each segment ; 

 a row of small, lateral, basal segmental, whitish triangular patches; venter 

 black-scaled, with narrow, white, basal segmental bands. 



